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Expression of claudin-1, -2, -3, -4, -5, and -7 in normal lung
| Localization | Claudin-1 | Claudin-2 | Claudin-3 | Claudin-4 | Claudin-5 | Claudin-7 |
|---|---|---|---|---|---|---|
| Alveolar epithelium | 0 (7) | 0 (7) | + (7) | + (7) | 0 (7) | + (7) |
| Bronchiolar epithelium | ++ (3) +++ (4) | ++ (2) +++ (5) | +++ (7) | ++ (4) +++ (3) | + (7) | +++ (7) |
| Endothelium | (+)a (7) | 0 (7) | 0 (7) | 0 (7) | +++ (7) | 0 (7) |
Very weak expression.
Total numbers of cases are shown in parentheses.
